refactor(mini): 个人中心改为登录+二级菜单结构

- 个人中心仅保留登录管理、我的数据/功能菜单与关于信息
- 新增偏好设置二级页 preferences（原偏好设置统一收敛至此）
- 新增我的收藏二级页 bookmarks，支持删除与跳转日详情
- 生辰管理拆分为二级页 birth-profiles，未登录时提示引导登录
- 八字页入口改为直达生辰管理页；修复 fortune 非 tabBar 页误用 switchTab

mini/pages/birth-profiles/birth-profiles.js

@@ -0,0 +1,108 @@
+const birthProfile = require('../../utils/birth-profile.js');
+
+Page({
+  data: {
+    loggedIn: false,
+    profiles: [],
+    activeProfileId: '',
+    maxFree: birthProfile.MAX_PROFILES,
+    canAdd: true,
+    showAddForm: false,
+    formName: '',
+    formGender: 'male',
+    formDate: '1990-01-01',
+    formTime: '12:00'
+  },
+
+  onShow() {
+    this.setData({ loggedIn: birthProfile.isLoggedIn() });
+    this.loadProfiles();
+  },
+
+  loadProfiles() {
+    const render = () => {
+      const profiles = birthProfile.getProfiles();
+      const active = birthProfile.getActiveProfile();
+      this.setData({
+        profiles,
+        activeProfileId: active ? active.id : '',
+        canAdd: profiles.length < this.data.maxFree
+      });
+    };
+    // 已登录时先从服务端同步，失败静默回退本地
+    if (birthProfile.isLoggedIn()) {
+      birthProfile.syncFromServer().then(render).catch(render);
+    } else {
+      render();
+    }
+  },
+
+  toggleAddForm() {
+    if (!this.data.showAddForm && !this.data.canAdd) {
+      wx.showToast({ title: `最多可免费绑定 ${this.data.maxFree} 个生辰`, icon: 'none' });
+      return;
+    }
+    this.setData({ showAddForm: !this.data.showAddForm });
+  },
+
+  onFormName(e) {
+    this.setData({ formName: e.detail.value });
+  },
+
+  setFormGender(e) {
+    this.setData({ formGender: e.currentTarget.dataset.g });
+  },
+
+  onFormDate(e) {
+    this.setData({ formDate: e.detail.value });
+  },
+
+  onFormTime(e) {
+    this.setData({ formTime: e.detail.value });
+  },
+
+  submitProfile() {
+    const { formName, formGender, formDate, formTime } = this.data;
+    if (!formDate || !formTime) {
+      wx.showToast({ title: '请选择出生日期和时间', icon: 'none' });
+      return;
+    }
+    const result = birthProfile.addProfile({
+      name: formName.trim() || '未命名',
+      gender: formGender,
+      birthday: formDate,
+      birthTime: formTime
+    });
+    if (!result.ok) {
+      wx.showToast({ title: result.msg, icon: 'none' });
+      return;
+    }
+    // 已登录时推送到服务端（静默失败，不影响本地）
+    birthProfile.pushProfileToServer(result.profile);
+    this.setData({ showAddForm: false, formName: '' });
+    wx.showToast({ title: '绑定成功', icon: 'success' });
+    this.loadProfiles();
+  },
+
+  removeProfile(e) {
+    const id = e.currentTarget.dataset.id;
+    const profile = this.data.profiles.find(p => p.id === id);
+    if (!profile) return;
+    wx.showModal({
+      title: '删除生辰',
+      content: `确定删除「${profile.name}」的生辰信息吗？`,
+      success: (res) => {
+        if (!res.confirm) return;
+        birthProfile.removeProfile(id);
+        birthProfile.removeProfileFromServer(profile);
+        wx.showToast({ title: '已删除', icon: 'success' });
+        this.loadProfiles();
+      }
+    });
+  },
+
+  // 未登录时引导回个人中心登录
+  goLogin() {
+    wx.navigateBack();
+  }
+});

mini/pages/birth-profiles/birth-profiles.json

@@ -0,0 +1,4 @@
+{
+  "navigationBarTitleText": "生辰管理",
+  "enablePullDownRefresh": false
+}

mini/pages/birth-profiles/birth-profiles.wxml

@@ -0,0 +1,70 @@
+<view class="container">
+  <!-- 未登录提示 -->
+  <view class="card login-tip" wx:if="{{!loggedIn}}">
+    <text class="text-sm">当前未登录，生辰仅保存在本机</text>
+    <text class="text-xs text-muted block mt-1">登录后可云端同步，换设备不丢失</text>
+    <view class="btn-outline text-center mt-2" bindtap="goLogin">去登录</view>
+  </view>
+
+  <!-- 生辰管理 -->
+  <view class="card">
+    <view class="section-title flex justify-between items-center">
+      <text>生辰管理</text>
+      <text class="text-xs text-muted">{{profiles.length}}/{{maxFree}}</text>
+    </view>
+    <view class="text-xs text-muted mb-2">八字排盘基于生辰信息，每位用户可免费绑定 {{maxFree}} 个出生年月（如本人、家人）。</view>
+
+    <view class="profile-list" wx:if="{{profiles.length > 0}}">
+      <view class="profile-item" wx:for="{{profiles}}" wx:key="id">
+        <view class="flex justify-between items-center">
+          <view>
+            <view class="flex items-center gap-1">
+              <text class="text-base font-medium">{{item.name}}</text>
+              <text class="badge badge-lucky" wx:if="{{item.id === activeProfileId}}">使用中</text>
+            </view>
+            <text class="text-xs text-muted block">{{item.gender === 'female' ? '女' : '男'}} · {{item.birthday}} {{item.birthTime}}</text>
+          </view>
+          <view class="btn-ghost text-unlucky" bindtap="removeProfile" data-id="{{item.id}}">删除</view>
+        </view>
+      </view>
+    </view>
+    <view class="text-center text-muted p-2" wx:else>
+      <text>暂未绑定生辰，请到下方添加</text>
+    </view>
+
+    <view class="btn-outline text-center mt-2" bindtap="toggleAddForm" wx:if="{{canAdd}}">
+      {{showAddForm ? '收起' : '+ 添加生辰'}}
+    </view>
+    <view class="text-center text-xs text-muted mt-2" wx:else>
+      免费名额已用完，可删除旧档案后添加
+    </view>
+
+    <!-- 添加表单 -->
+    <block wx:if="{{showAddForm}}">
+      <view class="form-item mt-2">
+        <text class="form-label">备注名（如：本人、爸爸）</text>
+        <input class="form-input" placeholder="未命名" value="{{formName}}" bindinput="onFormName"/>
+      </view>
+      <view class="form-item">
+        <text class="form-label">性别</text>
+        <view class="flex gap-2">
+          <view class="btn-outline {{formGender === 'male' ? 'active' : ''}}" bindtap="setFormGender" data-g="male">男</view>
+          <view class="btn-outline {{formGender === 'female' ? 'active' : ''}}" bindtap="setFormGender" data-g="female">女</view>
+        </view>
+      </view>
+      <view class="form-item">
+        <text class="form-label">出生日期（公历）</text>
+        <picker mode="date" value="{{formDate}}" start="1900-01-01" end="2100-12-31" bindchange="onFormDate">
+          <view class="picker-input">{{formDate}}</view>
+        </picker>
+      </view>
+      <view class="form-item">
+        <text class="form-label">出生时间</text>
+        <picker mode="time" value="{{formTime}}" bindchange="onFormTime">
+          <view class="picker-input">{{formTime}}</view>
+        </picker>
+      </view>
+      <view class="btn-primary text-center" bindtap="submitProfile">保存生辰</view>
+    </block>
+  </view>
+</view>

mini/pages/birth-profiles/birth-profiles.wxss

@@ -0,0 +1,56 @@
+.container {
+  padding: 20rpx;
+}
+
+.section-title {
+  font-size: 28rpx;
+  font-weight: 600;
+  margin-bottom: 16rpx;
+  color: #C41E3A;
+}
+
+.login-tip {
+  border: 1rpx dashed #C41E3A;
+}
+
+/* 生辰档案 */
+.profile-item {
+  padding: 16rpx 0;
+  border-bottom: 1rpx solid #E8D5C4;
+}
+
+.profile-item:last-child {
+  border-bottom: none;
+}
+
+/* 添加生辰表单 */
+.form-item {
+  margin-bottom: 24rpx;
+}
+
+.form-label {
+  font-size: 24rpx;
+  color: #6B5E53;
+  margin-bottom: 8rpx;
+  display: block;
+}
+
+.form-input {
+  padding: 20rpx;
+  background: #FFFBF5;
+  border-radius: 12rpx;
+  border: 1rpx solid #E8D5C4;
+}
+
+.picker-input {
+  padding: 20rpx;
+  background: #FFFBF5;
+  border-radius: 12rpx;
+  border: 1rpx solid #E8D5C4;
+}
+
+.btn-outline.active {
+  background: #C41E3A;
+  color: #FFFFFF;
+  border-color: #C41E3A;
+}